Superconducting proximity effect and Majorana flat bands in the surface of a Weyl semimetal

2016/01/31 by Anffany Chen, M. Franz · 1 citation
Physics and Astronomy · #cond-mat.supr-con #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.93.201105

published as Phys. Rev. B 93, 201105 (2016) · 4 pages, 2 figures; v2: published version

arxiv created 2016/05/26 · arxiv updated 2016/06/01

Abstract

We study the proximity effect between an s-wave superconductor (SC) and the surface states of a Weyl semimetal. An interesting two-dimensional SC forms in such an interface with properties resembling in certain aspects the Fu-Kane superconductor with some notable differences. In a Weyl semimetal with unbroken time reversal symmetry the interface SC supports completely flat Majorana bands in a linear Josephson junction with a π phase difference. We discuss stability of these bands against disorder and propose ways in which they can be observed experimentally.

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